September weather forecastSuwalki, Poland

September

Weather in September

With September comes the gentle transition from summer to autumn. Temperatures cool off and range from 7.2°C (45°F) to 16.4°C (61.5°F), welcoming the beginning of Fall. As daylight hours shorten, the tree foliage starts to change color, turning the city into a beautiful canvas painted with hues of fall.

Temperature

The onset of September in Suwalki brings a small change in high-temperatures, falling from an agreeable 21.4°C (70.5°F) in August to a comfortable 16.4°C (61.5°F). During September nights, Suwalki witnesses a consistent average temperature of 7.2°C (45°F).

Humidity

In September, the average relative humidity is 80%.

Rainfall

In Suwalki, during September, the rain falls for 13 days and regularly aggregates up to 53mm (2.09") of precipitation. In Suwalki, during the entire year, the rain falls for 169 days and collects up to 603mm (23.74") of precipitation.

Daylight

In Suwalki, Poland, the average length of the day in September is 12h and 42min.
On the first day of September in Suwalki, sunrise is at 05:37 and sunset at 19:18. On the last day of the month, sunrise is at 06:29 and sunset at 18:06 CEST.

Sunshine

The average sunshine in September is 5h.

Updated: Feb 1, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In September, the average high-temperature and low-temperature in Suwalki, Poland, are 16.4°C (61.5°F) and 7.2°C (45°F) respectively.

In September, the average relative humidity in Suwalki is 80%.

In Suwalki, in September, during 13 rainfall days, 53mm (2.09") of precipitation is typically accumulated.

The average day length in September in Suwalki is 12h and 42min.

In September, on the first day of the month, sunrise is at 05:37 and sunset at 19:18. On the last day of the month, in Suwalki, Poland, sunrise is at 06:29 and sunset at 18:06 CEST.

In Suwalki, the average sunshine duration in September is 5h.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

21.4°C

16.4°C

11.8°C

Average low temperature

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average temperature in September
Suwalki, Poland

Average high temperature in September: 16.4°C

The warmest month (with the highest average high temperature) is July (22.4°C).
The month with the lowest average high temperature is January (-2.8°C).

Average low temperature in September: 7.2°C

The month with the highest average low temperature is July (12°C).
The coldest month (with the lowest average low temperature) is January (-6.6°C).

Average humidity in September
Suwalki, Poland

Average humidity in September: 80%

The month with the highest relative humidity is December (86%).
The months with the lowest relative humidity are May and June (77%).

Average rainfall in September
Suwalki, Poland

Average rainfall in September: 53mm

The wettest month (with the highest rainfall) is June (78mm).
The driest month (with the least rainfall) is February (25mm).

Average rainfall days in September
Suwalki, Poland

Average rainfall days in September: 13 days

The month with the highest number of rainy days is October (16 days).
The months with the least rainy days are April and May (12 days).

Average daylight in September /
Average sunshine in September
Suwalki, Poland

Average daylight in September: 12h and 42min

The month with the longest days is June (Average daylight: 17h and 6min).
The month with the shortest days is December (Average daylight: 7h and 30min).

Average sunshine in September: 5h and 0min

The month with the most sunshine is June (Average sunshine: 7h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 0min).